Loose-leaf binder



H. o. BURROUGHS ET AL Sept. 2 1924.

- LOOSE LEAF BINDER Filed Jan. 15, 1923 2 Sheets-Sheet l QWJL 9 mymuwSept. 2 1924.

H. O. BURROUGHS ET AL LOOSE LEAF BINDER Filed Jan. 15, 1923 2Sheets-Sheet 2 Patented Sept. 2, 1924.

-U DI'S AITE P T NT:O

' HAROLD OSMOND, BUnnoUeirs Aim mm s'r'nnjnn'y snnnouen's; or mvnnroonENGLA DLH f Loose-LEAF izr'ivnnni Application filed-January 15, 1923."Serial No. 612,805.

To all whom it on ay'cowcem Be it known that we, HAROLD Os w'roNnBURRoUGHs and ERIC STANLEY BURROUGHS,

subjects of the King of Great Britain, andresidents of Liverpool,England, have-in vented certain new and useful Improvements inLoose-Leaf Binders,;of which the view.-: Figs. 3,4, and 5are fragmentaryelev following is a specification. This invention relates to loose leafbinders such as ledgers or the like of the type-com prising a pair ofclamping bars capable of being drawn together by thongs 'or'tapes;

"In such apparatus a ratchet wheel and a pawl have been provided toprevent backi ward rotation of the winding spindle andj means has alsobeen provided on the actuat clamping bars and, consequently, the open mgor closing'of the covers does not d sturb the grip obtained on the looseleaves by the bars. -The thongs or-the like, whichpass through aperturesin the loose leaves'and-in the clamping bars in the usual way, areconnected together by a-yoke piece or the like to which is coupleda'fiexible cordwinding on a pulley or disc fitted or-provided witharatchet which is normallyengaged by f a spring controlled pawl. The discispr'ovided with a cam surface or'the like preferably ofcircular contourand liavinga face or abutment atone end of the cam. The key is providedwith a projection which is adapted to be entered through a slot in theratchet disc when it is desired to operate the mechanism, theprojection, when the key is turned in one direction, engaging the faceor abutment of the cam and turning the disc to wind and tighten up thetapes or thongs in order to bind the ledger, but if the key be rotatedin the opposite direction, the projection by riding up the slope of thecircular cam sets up longitudinal movement of the key which movementdisengages the By so pivoting the backs or i spring controlled pawl fromthe ratchet and frees the binding tapes.

A. loose leaf ledger in accordance with this; invention isillustrated-in the accompanying drawings in whichFig. 1 is an elevationshowing the ledgercovers opened out and thele'aves'removed. Fig.2 is anedge vation,'l'side, and end views respectively to alarger scaleshowing'the pivotal connection of :the ledger back to the clamping bars.Fig. 6 isa rear elevation of the ratchet disc and casing.v Fig, 7 his adiametral-section through' 'the" casingv with the operating keyinrposition andFig. 8 is a front elevation with the top of the casingcutaway. Fig.

9'isia detail-of the ratchet disc itself with part of the flexiblecordattached.

--:In asuitable construction the clamping bars'consist of channel orsolid elements 1 having-apertures Q'thrOugh which pass the binding tapesor=thongs 8, the ends of the thongs connecting to one clamping bar 1*,and the other endsofthe thongs being connected by a yoke 4 to which iscoupled a flexible cord 5 such as a light stranded wire rope.- The otherend of this stranded wire is connected at G te-the periphery of a disc 7on which is secured orformed a ratchet 8, the disc being-rotatablymounted in a cas-- ing 9 whichcarries a spring controlled pawl 10normally held; in engagement with the ratchet' The pawl may, as shown,he formed V on the end of a'plate secured to the casing loosely by asc'rew '11 a light leaf spring 12 beingecured a't 13 to the casing andat its other end -l2f"to" the pawl Theeye of the ratchet-disc isprovidec with a longitudinal groove 14 to pass a projection 15 on thecylindrical shank 16 of the operating key, which groove terminates in aspac'e'between the ends of a circular cam- 17. Consequently, when thekey is inserted and its projection passes down the longitudinal groovethe proj ection 15 ultimately be comes positioned in the space 18between the ends of the cam, and by turning the key in one direction theprojection engages the high end 17 of the cam and positively rotates thewhole ratchet disc to wind up the flexible element 5 and tighten thetapesS. The clamping bars 1, 1 are thus drawn tightly together and theleaves a consolidated.

Reverse turning of the key, however,

v clamping bars are pivotally conneeted to :the

c uses the projec i n o ride taking h sloping cam face 11 which actionpushes the key inwardly, depressing the spring 12 backs or covers and,when vthe b-indingrmechr anism is tightened up, theiclamping hars are.

free ,to accommodate themselves easily and firmly against the looseleaues vand at the same time when'the clamping'bar-s have been tightlydrawn together the" opening of the covers or backs'of thebinderldoesinot disturb the grip of the clamping bars, which is lptvtooccurin other forms ofsuch loose leaf. binding mechanisms Where theclamping bars are rigidly carried by such covers. The clamping bars maybeiot channeliseetion and may be made up of sheet metal, asvmay also bethe case with the brackets OllitllQ covers.

he thongs 3, yoke v l, flexible wince, stranded cord or the like,together with the ratchet disc 7 and its casing, may all be housed inone ofthecovers oi the binder as JhOlVIl.

In order to ensure that the clamping bars shall obtain a grip on theleaves eyen when the solid clamping position vcorrespends to a positionof the pawl -.midway between two geeth ontheratchet disc, instead of the{flexible element 5, being directly connected they may be connected tothe yoke 4 through "a stout spring so that slight nesilieney isobtainable in tightening up the clamping bars and thus permit of theloose leaves being securely held,,even when the normal locking positionof the pawl 10 IIAidWfiY between two ratchet teetl-i, the fall back ofthe d aga n e paw ne .slaehem gith mp g a g ip owing to the spring hennection.

The edges of the loose leaves are, punched withslots the paper at the,rear edgeof the aizesiheyehd ea hLs hheiiig d wid i s a the lugs ofpaper which enclose the slots at the ear may he bent o t to Op n the sland pass the leaves over the thongs in well known manner, the lugs beingsubsequently bent into, ,the' plane of the leaf behind the thongs.

shim:

1. A loose leaf binding mechanism, comp g, binding. element onne te to aommon yok le s-ratch ,clisc by "t e tio 0f whichthe i; ing e emen artightened, flexibl lee- 3d wind ng 9111511651 5 and G911- neet drto he yhe, .e spr hg con r ed paw anually ngaging th rat-e et,.,a cam e 11 aceQn--the di c, abu ea th disc, a y for Operating the d h y ha ng a peieetioh which .eheeees the abutmen an otate the dis when the key iturned wac', .hu;t;engaee th 4 am an eause mhe k y 0idiseheegethepw'uhen the key is t rned h eth r Way- ;2- A loose l af binding m cha ism,0.

p isi g, hind r hote .el mp hg :har pin ally c nnected 1 9 the o t bindg e men a ratchet is hyv the ot t n o wh h the bi ding e ement re tghten d, Ia eeing e ntr ll paw normally eng gin the ratchet, a camsurface on the disc, an, hutmeht on the disc, a th y :f Qnemtih h -d sc,s id hey a i g a ip ei c i n for a ing ei h the :ahutment o the hamlqqsleahi d-hag mechan m, m- I prisms, wb-mde O Br ,--C mP Jg he Pivta yijeqt to the m rs, nd ng-s e

